Suffolk County and Smithtown Town property record for 20 William St, Smithtown, NY 11787 · Last verified August 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 2.5 Baths |
| Year Built | Built 1984 |
| Square Footage | 1,608 sqft Living Area |
| Lot Size | 10,019 sqft (0.23 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $166,000 (1997) |
| Tax Bill | $12,818.00 (2024) |
Source: Suffolk County and Smithtown Town records · APN 473489 134.-4-41.1
Assessment roll updated August 11, 2026 · Last verified August 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 20 WILLIAM ST, SMITHTOWN, NY 11787-5717 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Jun 02, 1997 · Amount on Record |
| Deed Sale | Jun 02, 1997 · Amount on Record |
| Deed Book / Page | 11833 / 435 |
| Last Transfer Date | Aug 06, 2001 |
| Transfer Doc | 1213000341 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SUFFOLK NY |
| Property Address | 20 WILLIAM ST, SMITHTOWN, NY 11787-5717 |
| Transaction Type | Mortgage |
| Record Updated | Apr 21, 2026 |
| Name | Verified Name |
|---|
| Document Number | 0233390077 |
|---|---|
| Date | Oct 26, 2021 |
| Book Page | 23339/77 |
| Instrument | DM042360 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Type | Stand Alone Refinance |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Nov 01, 2051 |
Source: Suffolk County and Smithtown Town records · Assessment roll updated August 11, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | New York |
| County | Suffolk County |
| County Subdivision | Smithtown Town |
| Unified School District | Smithtown Central School District (KG - 12) |
Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2025 | $4,920 (-) Land $250 Building $4,670 | $615,000 (+10,775.33%) Land $31,250 Building $583,750 | |
| 2024 | $12,818.00 | ||
| 2023 | $4,920 Land $250 Building $4,670 | $5,655 Land $287 Building $5,368 |
Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), updated September 18, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified: October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
Values are read at the parcel center point; lenders make the official flood determination.
| Primary APN | 473489 134.-4-41.1 |
|---|---|
| Alternative APNs |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Partial Baths | 1 Partial Baths |
| Building Area | 1,608 sqft Living Area |
| 1st Floor | 1,108 sqft 1st Floor |
| Basement Area | 500 sqft Basement |
| Finished Basement | 500 sqft Finished |
| Stories | 1 Stories |
| Year Built | Built 1984 |
|---|---|
| Effective Year Built | Effective 1984 |
| Architectural Style | Raised Ranch Style |
| Exterior Material | Composition/Composite Exterior |
| Lot Area | 10,019 sqft (0.23 acres) |
| Garage Type | Basement Garage |
| Pool Area | 576 sqft Pool |
|---|---|
| Shed | 1 Shed |
| Shed Area | 96 sqft Shed |
| Porch | Open Porch |
| Porch Area | 170 sqft Porch |
| View | Suburban View |
| Heating System | Hot Water Heating |
|---|---|
| Heating Fuel | Oil Heating Fuel |
| Sewage | Sewage Connected |
| Water Source | Commercial Water Source |
| Street Address | 20 WILLIAM ST |
|---|---|
| City | SMITHTOWN |
| State | NY |
| Zip | 11787-5717 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | 4-161226.1 TC-68 BIRCHCROFT COLONY BLK L LOTS 21-25 *23 |
| Legal Subdivision | MAP BIRCHCROFT COLONY |
| Legal Block | 4 |
| Legal Lot Number | 41 |
| Jurisdiction | SUFFOLK NY |
| Minor Civil Division | SMITHTOWN |
| Census Blockgroup | 3 |
| Census Block | 3016 |
| Census Tract | 135306 |
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